<?php 

/**
* 
*/
class Father01 
{
	
	function suiji($nums=16)
	{
		 echo $this->suiji01($nums);

	}
	function suiji01($num)
	{
		$kong="";
		$str="abcdefghijklmnopk";
		for ($i=1; $i <= $num; $i++) { 
			$a=rand(0,16);
			$kong=$kong.$str[$a];
		}
		return $kong;
		
	}
}








 ?>